Method and apparatus for map transmission in wireless communication system

Abstract

An operating method of a base station for transmitting MAP information in a wireless communication system includes determining a seed value for randomizing MAP information bits, generating a Media Access Control (MAC) control message including the seed value and a Station IDentifier (STID), and transmitting the MAC control message to a mobile station. Hence, the assignment A-MAP IE can be transmitted more safely.

What is claimed is: 
     
       1. An operating method of a base station for transmitting MAP information in a wireless communication system, the method comprising:
 determining a seed value for randomizing MAP information bits; 
 generating a Media Access Control (MAC) control message including the seed value and a Station IDentifier (STID); and 
 transmitting the MAC control message to a mobile station, 
 wherein the STID is used as a Cyclic Redundancy Check (CRC) mask making code. 
 
     
     
       2. The method of  claim 1 , wherein the MAC control message is one of an Advanced Air Interface (AAI)-RaNGing (RNG)-ReSPonse (RSP) message sent from the base station in response to an AAI-RNG-REQuest (REQ) message received from the mobile station in a network entry, an AAI-REGistration (REG)-RSP message sent from the base station in response to an AAI-REG-REQ message received from the mobile station to register the mobile station by negotiating general Advanced Mobile Station (AMS) capabilities in the network entry, and an AAI-HandOver (HO)-CoMmanD (CMD) message sent from the base station to initiate a handover procedure or in response to an AAI-HO-REQ message received from the mobile station. 
     
     
       3. The method of  claim 1 , wherein, when the STID is used as a Cyclic Redundancy Check (CRC) mask masking code, the seed value is used to initiate a Pseudo-Random Binary Sequence (PRBS) generator which is used to scramble the MAP information bits. 
     
     
       4. The method of  claim 1 , further comprising:
 generating a sequence of bits using the seed value and randomizing the MAP information bits by performing an XOR operation on the generated sequence and the MAP information bits; 
 masking a 16-bit CRC using the CRC mask masking code; 
 adding the masked 16-bit CRC to the randomized MAP information bits; and 
 transmitting the randomized MAP information including the masked CRC. 
 
     
     
       5. The method of  claim 1 , wherein the CRC mask masking code comprises a 1-bit masking prefix and a 15-bit Least Significant Bit (LSB) remainder,
 wherein, when the masking prefix is 0, the 15-bit LSB remainder includes a 3-bit type indicator and a 12-bit masking code, and 
 wherein, when the masking prefix is 1, the 15-bit LSB remainder includes a Random Access ID (RAID). 
 
     
     
       6. The method of  claim 1 , wherein the seed value is a time-varying value that is altered from an initial value after a predetermined amount of time. 
     
     
       7. The method of  claim 6 , wherein the base station and the mobile station synchronized to a shared time-varying function that alters the seed value after the predetermined amount of time. 
     
     
       8. The method of  claim 1 , wherein, when the STID is not the CRC mask masking code, then the initial vector of a Pseudo-Random Binary Sequence (PRBS) generator is the same as the CRC mask masking code excluding a 1-bit masking prefix. 
     
     
       9. An operating method of a mobile station for receiving MAP information in a wireless communication system, the method comprising:
 receiving from a base station a Media Access Control (MAC) control message including a seed value for randomizing MAP information bits and a Station IDentifier (STID) in a network entry procedure; 
 extracting the seed value and the STID from the MAC control message; and 
 decoding the MAP information bits using the seed value and the STID, 
 wherein the STID is used as a Cyclic Redundancy Check (CRC) mask masking code. 
 
     
     
       10. The method of  claim 9 , wherein the MAC control message is one of an Advanced Air Interface (AAI)-RaNGing (RNG)-ReSPonse (RSP) message sent from the base station in response to an AAI-RNG-REQuest (REQ) message received from the mobile station in a network entry, an AAI-REGistration (REG)-RSP message sent from the base station in response to an AAI-REG-REQ message received from the mobile station to register the mobile station by negotiating general Advanced Mobile Station (AMS) capabilities in the network entry, and an AAI-HandOver (HO)-CoMmanD (CMD) message sent from the base station to initiate a handover procedure or in response to an AAI-HO-REQ message received from the mobile station. 
     
     
       11. The method of  claim 9 , wherein, when the STID is used as a Cyclic Redundancy Check (CRC) mask masking code, the seed value is used to initiate a Pseudo-Random Binary Sequence (PRBS) generator which is used to scramble the MAP information bits. 
     
     
       12. The method of  claim 9 , wherein the decoding of the MAP information bits using the seed value and the STID comprises:
 restoring a masked CRC in the MAP information bits, using the CRC mask masking code; 
 verifying a CRC using the restored CRC; 
 generating a sequence of bits using the seed value for the randomization after the verifying of the CRC; and 
 derandomizing the MAP information bits by performing an XOR operation on the generated sequence and the randomized MAP information bits. 
 
     
     
       13. The method of  claim 9 , wherein the CRC mask masking code includes a 1-bit masking prefix and a 15-bit Least Significant Bit (LSB) remainder,
 wherein, when the masking prefix is 0, the 15-bit LSB remainder comprises a 3-bit type indicator and a 12-bit masking code, and 
 wherein, when the masking prefix is 1, the 15-bit LSB remainder uses a Random Access ID (RAID). 
 
     
     
       14. The method of  claim 9 , wherein, when the STID is not the CRC mask masking code, then the initial vector of a Pseudo-Random Binary Sequence (PRBS) generator is the same as the CRC mask masking code excluding a 1-bit masking prefix. 
     
     
       15. An apparatus of a base station for transmitting MAP information in a wireless communication system, the apparatus comprising:
 a controller for determining a seed value for randomizing MAP information bits, and generating a Media Access Control (MAC) control message including the seed value and a Station IDentifier (STID); and 
 a transmitter for transmitting the MAC control message to a mobile station, 
 wherein the STID is used as a Cyclic Redundancy Check (CRC) mask masking code. 
 
     
     
       16. The apparatus of  claim 15 , wherein the MAC control message is one of an Advanced Air Interface (AAI)-RaNGing (RNG)-ReSPonse (RSP) message sent from the base station in response to an AAI-RNG-REQuest (REQ) message received from the mobile station in a network entry, an AAI-REGistration (REG)-RSP message sent from the base station in response to an AAI-REG-REQ message received from the mobile station to register the mobile station by negotiating general Advanced Mobile Station (AMS) capabilities in the network entry, and an AAI-HandOver (HO)-CoMmanD (CMD) message sent from the base station to initiate a handover procedure or in response to an AAI-HO-REQ message received from the mobile station. 
     
     
       17. The apparatus of  claim 15 , wherein, when the STID is used as a Cyclic Redundancy Check (CRC) mask masking code, the seed value is used to initiate a Pseudo-Random Binary Sequence (PRBS) generator which is used to scramble the MAP information bits. 
     
     
       18. The apparatus of  claim 15 , further comprising:
 a randomizer for generating a sequence of bits using the seed value and randomizing the MAP information bits by performing an XOR operation on the generated sequence and the MAP information bits; 
 a CRC mask for masking a 16-bit CRC using the CRC mask masking code; 
 a CRC inserter for adding the masked 16-bit CRC to the randomized MAP information bits; 
 a channel encoder for encoding the randomized MAP information including the masked CRC; and 
 a modulator for modulating the channel-encoded MAP information. 
 
     
     
       19. The apparatus of  claim 15 , wherein the CRC mask masking code comprises a 1-bit masking prefix and a 15-bit Least Significant Bit (LBS), and
 when the masking prefix is 0, the LBS  15  bits comprise a 3-bit type indicator and a 12-bit masking code, and when the masking prefix is 1, the LBS  15  bits use a Random Access ID (RAID). 
 
     
     
       20. The apparatus of  claim 15 , wherein, when the STID is not the CRC mask masking code, then the initial vector of a Pseudo-Random Binary Sequence (PRBS) generator is the same as the CRC mask masking code excluding a 1-bit masking prefix. 
     
     
       21. An apparatus of a mobile station for receiving MAP information in a wireless communication system, the apparatus comprising:
 a receiver for receiving a Radio Frequency (RF) signal from a base station, the RF signal including a Media Access Control (MAC) control message including a seed value for randomizing MAP information bits and a Station IDentifier (STID) in a network entry procedure; and 
 a decoder for extracting the seed value and the STID from the MAC control message, and for decoding the MAP information bits based on the seed value and the STID, 
 wherein the STID is used as a Cyclic Redundancy Check (CRC) mask masking code. 
 
     
     
       22. The apparatus of  claim 21 , wherein the MAC control message is one of an Advanced Air Interface (AAI)-RaNGing (RNG)-ReSPonse (RSP) message sent from the base station in response to an AAI-RNG-REQuest (REQ) message received from the mobile station in a network entry, an AAI-REGistration (REG)-RSP message sent from the base station in response to an AAI-REG-REQ message received from the mobile station to register the mobile station by negotiating general Advanced Mobile Station (AMS) capabilities in the network entry, and an AAI-HandOver (HO)-CoMmanD (CMD) message sent from the base station to initiate a handover procedure or in response to an AAI-HO-REQ message received from the mobile station. 
     
     
       23. The apparatus of  claim 21 , wherein,
 when the STID is used as a Cyclic Redundancy Check (CRC) mask masking code, the seed value is used to initiate a Pseudo-Random Binary Sequence (PRBS) generator which is used to scramble the MAP information bits. 
 
     
     
       24. The apparatus of  claim 21 , wherein the decoder restores the masked CRC in the MAP information bits, using the CRC mask masking code, and further comprising:
 a CRC checker for checking CRC using the restored CRC; and 
 a derandomizer for generating a sequence of bits using the seed value for the randomization and derandomizing the MAP information bits by performing an XOR operation on the generated sequence and the randomized MAP information bits. 
 
     
     
       25. The apparatus of  claim 21 , wherein the CRC mask masking code comprises a 1-bit masking prefix and a 15-bit Least Significant Bit (LSB) remainder,
 wherein, when the masking prefix is 0, the 15-bit LSB remainder includes a 3-bit type indicator and a 12-bit masking code, and 
 wherein, when the masking prefix is 1, the 15-bit LSB remainder uses a Random Access ID (RAID). 
 
     
     
       26. The apparatus of  claim 21 , wherein, when the STID is not the CRC mask masking code, then the initial vector of a Pseudo-Random Binary Sequence (PRBS) generator is the same as the CRC mask masking code excluding a 1-bit masking prefix.